[@Lucius Cypher]
1. So she got the beast as a curse because she was on the forest were they were? I suppose that could work.
2. I agree that the black blob isn't as cool as the black beast but the creature is still a blob.
3. If the mask is symbolic then the beast isn't contextend to the mask. Therefore having that be a weakness makes no sense. 
4. That's good that you didn't intend the similarity. 
5. I am not sure I understand how the beast hungry connects to Arachne but I suppose that could develop in time.
6. If destroying the mask destroys or atleast forces the beast back inside then the beast should be connected to the mask. Otherwise it makes no sense to have the mask affect the beast.